WO2006035666A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2006035666A1 WO2006035666A1 PCT/JP2005/017475 JP2005017475W WO2006035666A1 WO 2006035666 A1 WO2006035666 A1 WO 2006035666A1 JP 2005017475 W JP2005017475 W JP 2005017475W WO 2006035666 A1 WO2006035666 A1 WO 2006035666A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- block
- tire
- pneumatic tire
- width direction
- stepped
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
Definitions
- the present invention relates to a pneumatic tire having a block in a tread portion.
- Patent Documents 1 to 3 Conventionally, in order to improve tire running performance, it has been proposed to form a step in a block constituting a tread portion (see, for example, Patent Documents 1 to 3).
- a main groove in the tire circumferential direction is provided in the tread portion, and the outermost main groove force is also directed to the grounding edge. Is provided.
- the lug groove formed in this way generates a shear force by forming a snow column in the groove when the snow surface is swallowed, and in addition, synergizes with the edge effect (wedge effect), and the tractive force on the snow. Is generated.
- Patent Document 1 Japanese Patent Laid-Open No. 63-278809
- Patent Document 2 Japanese Patent Laid-Open No. 3-186406
- Patent Document 3 Japanese Patent Laid-Open No. 4-278809
- an object of the present invention is to provide a pneumatic tire with improved snow performance without significantly reducing dry performance.
- a partial force of at least one of the block constituting the tread portion of the tire and the step-in side end portion and the kick-out side end portion of the block is projected toward the groove portion, and the block And a step portion lower than the height of the block.
- the stepped portion is stretched by applying a force to at least a partial force groove portion of the stepping side end portion and the kicking side end portion of each block constituting the tread portion. Steps are provided without removing the blocks and the height of the steps is lower than the block height, enabling optimization of snow performance and dry performance.
- the width of the stepped portion is preferably in the range of 1.0 mm to 2. Omm. If the width is less than 1. Omm, it is not so easy to obtain sufficient snow performance at the edge pressure. Also, if the width is 2. Omm or more, the block rigidity is likely to be greatly reduced, so the dry performance is likely to be reduced.
- the depth of the stepped portion is preferably in the range of 1.0 mm to 2. Omm. If the depth is 1. Om m or less, it is not easy to obtain sufficient snow performance from the edge pressure. In addition, if the depth is 2. Omm or more, the block rigidity tends to be greatly reduced, so that the dry performance is likely to deteriorate.
- Both the width and depth of the step are 1. Omn! 2. If it is within the range of Omm, it will be the optimum dimension that can obtain sufficient edge pressure, and the degree of block rigidity will be small.
- the length of the step portion in the tire width direction is preferably within a range of 30 to 100% of the block width.
- the step portion is formed closer to the inner side in the tire width direction at the stepped side end portion of the block, and the outer side in the tire width direction on the kicking side of the block. It is preferable that they are formed close to each other. This makes it possible to separate the contribution of traction and braking and improve snow performance more effectively. It can be done.
- the invention according to claim 3 includes a block constituted by a tire circumferential groove and a lug groove intersecting with the circumferential groove, and a partial force groove portion on at least one of both circumferential end surfaces of the block. It has a step portion that protrudes by force and is lower than the height of the block.
- the invention according to claim 4 is the invention according to claim 3, wherein the stepped portion is formed closer to the inner side in the tire width direction at the end in the circumferential direction of the block, and the block is kicked in the circumferential direction. It is characterized in that it is formed on the outer side in the tire width direction.
- the invention according to claim 5 is the invention according to claim 2 or claim 4, wherein the step portion extends outward from the inner end portion in the tire width direction at an end portion on the circumferential stepping side of the block. It is characterized in that, on the kicking side of the block, it is extended inward from the outer end in the tire width direction.
- the invention according to claim 6 is characterized in that the stepped portions are arranged in a staggered manner in the tread portion.
- the invention described in claim 7 is characterized in that a zigzag sipe in plan view is formed on the block.
- a pattern having directionality may be formed in the tread portion.
- the present invention has the above-described configuration, the steering stability when traveling on a dry road surface is greatly reduced. Thus, a pneumatic tire with improved snow performance can be realized.
- FIG. 1 is a cross-sectional view in the width direction of a pneumatic tire according to an embodiment of the present invention.
- FIG. 2 is a partial plan view showing a tread portion of a pneumatic tire according to an embodiment of the present invention.
- FIG. 3 is a partial cross-sectional view of a block constituting a tread portion of a pneumatic tire according to an embodiment of the present invention (partial cross-sectional view taken along arrow 3-3 in FIG. 2).
- FIG. 4A is a schematic plan view of a block constituting a tread portion of a pneumatic tire according to one embodiment of the present invention.
- FIG. 4B is a schematic side view of arrows 4B-4B in FIG. 4A.
- FIG. 5 is a partial cross-sectional view showing a step portion of a conventional pneumatic tire.
- a pneumatic tire 10 includes a belt 14 and a tread portion 16 provided with grooves on the outer side of a crown portion 12C of a carcass 12 extending in a toroidal shape. Have.
- the tread portion 16 is configured to rotate in the rotation direction S when moving forward. Further, the tread portion 16 has step portions 22F and 22R which are continuous so as to protrude from substantially half portions on the stepping side and the kicking side of the blocks 20 constituting the tread portion 16, respectively. The height of the step portions 22F and 22R is lower than the block height.
- the stepped portion 22F on the step-in side is formed closer to the inner side in the tire width direction, and the stepped portion 22R on the kicking side is formed closer to the outer side in the tire width direction.
- the stepped portions 22 are arranged in a staggered pattern on the tread surface.
- the width B of the stepped portions 22F, 22R is preferably in the range of 1.0 mm to 2. Omm.
- the width B is 1. Omm or less, it is not very easy to obtain sufficient snow performance at the edge pressure.
- the width B is 2. Omm or more, the allowance for block rigidity increases easily. The lie performance is likely to deteriorate.
- the depth D of the stepped portions 22F, 22R is preferably in the range of 1.0 mm to 2. Omm.
- the depth D is 1. Omm or less, it is not easy to obtain sufficient snow performance from the edge pressure.
- the depth D is 2. Omm or more, the allowance for block rigidity increases and the dry performance tends to decrease.
- the width B and the depth D of the stepped portions 22F and 22R are both within the range of 1.0 mm to 2. Omm, the edge dimensions are optimally obtained and the block rigidity is reduced. Less degree.
- each block 20 is formed with a sipe 24 having a zigzag shape in plan view, whereby the snow performance can be further improved.
- the step portions 22F and 22R are continuous so as to protrude to the stepping side and the kicking side of each block 20 constituting the tread portion 16, respectively. Steps 22F and 22R are provided without shaving.
- the width B and depth D of the step portions 22F and 22R are defined within the above range.
- the stepped portion 22F on the step-in side is formed closer to the inner side in the tire width direction
- the stepped portion 22R on the kicking side is formed closer to the outer side in the tire width direction.
- the stepped portions 22 are arranged in a staggered pattern on the tread surface.
- the block rigidity does not decrease so much, and the snow performance can be improved by the step portions.
- the step portions 22F and 22R are arranged in a zigzag manner on the tread portion 16, which makes it easy to optimize the block rigidity.
- a pneumatic tire 10 having stepped portions 22F and 22R having a width B of 1.5 mm and a depth D of 2. Omm is attached to a vehicle, and an experiment for evaluating dry performance and snow performance is performed. went .
- the dry performance was similarly evaluated using BSPG, and the snow performance was evaluated using HPG with an evaluation index of a conventional pneumatic tire set to 100 (see the examples in Table 1). Compared to conventional pneumatic tires, the dry performance was not degraded at all, and the snow performance was greatly improved.
- a pneumatic tire 10 having stepped portions 22F and 22R having a width B of 2.5 mm and a depth D of 2.5 mm is attached to the vehicle, and the dry performance and snow performance are evaluated in the same manner. did. Compared to conventional pneumatic tires, the dry performance was slightly reduced, but the snow performance was significantly improved.
- the blocks constituting the tread portion protrude from the stepping-in side and the kicking-out side, respectively.
- the stepped portion is continuous, and even if the stepped portion is provided, the block rigidity is not lowered so much, and the dry performance is not lowered so much. Also, the snow performance can be improved by the edge pressure of this step.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/663,881 US20080257467A1 (en) | 2004-09-27 | 2005-09-22 | Pneumatic Tire |
EP05785493A EP1795374A4 (en) | 2004-09-27 | 2005-09-22 | PNEUMATIC |
NO20071683A NO20071683L (no) | 2004-09-27 | 2007-03-30 | Pneumatisk dekk |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-280685 | 2004-09-27 | ||
JP2004280685A JP2006089004A (ja) | 2004-09-27 | 2004-09-27 | 空気入りタイヤ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006035666A1 true WO2006035666A1 (ja) | 2006-04-06 |
Family
ID=36118814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017475 WO2006035666A1 (ja) | 2004-09-27 | 2005-09-22 | 空気入りタイヤ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080257467A1 (ja) |
EP (1) | EP1795374A4 (ja) |
JP (1) | JP2006089004A (ja) |
NO (1) | NO20071683L (ja) |
WO (1) | WO2006035666A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11440352B2 (en) | 2016-12-20 | 2022-09-13 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5150421B2 (ja) * | 2008-09-08 | 2013-02-20 | 株式会社ブリヂストン | 空気入りタイヤ |
USD608724S1 (en) | 2009-03-16 | 2010-01-26 | Trek Bicycle Corporation | Bicycle tire tread |
EP2471671B1 (en) * | 2009-08-25 | 2014-08-06 | Bridgestone Corporation | Pneumatic tire |
EP2504179B1 (en) * | 2009-11-23 | 2014-10-22 | MICHELIN Recherche et Technique S.A. | Tire with a lateral groove having a chamfer for improved snow performance |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03186406A (ja) * | 1989-12-14 | 1991-08-14 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
JPH04197809A (ja) * | 1990-11-29 | 1992-07-17 | Bridgestone Corp | 空気入りラジアルタイヤのブロック |
JPH05178024A (ja) * | 1991-12-27 | 1993-07-20 | Yokohama Rubber Co Ltd:The | 乗用車用空気入りタイヤ |
JPH11180116A (ja) * | 1997-12-22 | 1999-07-06 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2001121926A (ja) * | 1999-10-25 | 2001-05-08 | Bridgestone Corp | 空気入りタイヤ |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3656731B2 (ja) * | 2000-08-24 | 2005-06-08 | 横浜ゴム株式会社 | 空気入りタイヤ |
-
2004
- 2004-09-27 JP JP2004280685A patent/JP2006089004A/ja active Pending
-
2005
- 2005-09-22 US US11/663,881 patent/US20080257467A1/en not_active Abandoned
- 2005-09-22 WO PCT/JP2005/017475 patent/WO2006035666A1/ja active Application Filing
- 2005-09-22 EP EP05785493A patent/EP1795374A4/en not_active Withdrawn
-
2007
- 2007-03-30 NO NO20071683A patent/NO20071683L/no not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03186406A (ja) * | 1989-12-14 | 1991-08-14 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
JPH04197809A (ja) * | 1990-11-29 | 1992-07-17 | Bridgestone Corp | 空気入りラジアルタイヤのブロック |
JPH05178024A (ja) * | 1991-12-27 | 1993-07-20 | Yokohama Rubber Co Ltd:The | 乗用車用空気入りタイヤ |
JPH11180116A (ja) * | 1997-12-22 | 1999-07-06 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP2001121926A (ja) * | 1999-10-25 | 2001-05-08 | Bridgestone Corp | 空気入りタイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1795374A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11440352B2 (en) | 2016-12-20 | 2022-09-13 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
Also Published As
Publication number | Publication date |
---|---|
EP1795374A1 (en) | 2007-06-13 |
US20080257467A1 (en) | 2008-10-23 |
NO20071683L (no) | 2007-06-21 |
EP1795374A4 (en) | 2008-11-05 |
JP2006089004A (ja) | 2006-04-06 |
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